HTML/CSS: How to add Custom Banner in phpBB Style - html

Question

I need some assistance in replacing and adding my own Header to the DualCore style. I tried contacting the author of the style, but it appears he is not available.
As you can see there's small header on top right under the login link, but i am having some difficulties replacing it and adding my own header.
Part of the Header i want to replace is "mainheader" and looks like this"mainheader" In the overal_header.html you can find it, but im not so sure what to add or replace. My banner image is "dep_banner.png" width: 900 Height: 145.
Common.css
/* General Markup Styles
---------------------------------------- */
* {
/* Reset browsers default margin, padding and font sizes */
margin: 0;
padding: 0;
}
html {
font-size: 100%;
/* Always show a scrollbar for short pages - stops the jump when the scrollbar appears. non-IE browsers */
height: 101%;
}
body {
/* Text-Sizing with ems: http://www.clagnut.com/blog/348/ */
font-family: Verdana, Helvetica, Arial, sans-serif;
color: #828282;
background-color: #FFFFFF;
/*font-size: 62.5%; This sets the default font size to be equivalent to 10px */
font-size: 10px;
margin: 0;
padding: 12px 0;
}
h1 {
/* Forum name */
font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
margin-right: 200px;
color: #FFFFFF;
margin-top: 15px;
font-weight: bold;
font-size: 2em;
}
h2 {
/* Forum header titles */
font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
font-weight: normal;
color: #3f3f3f;
font-size: 2em;
margin: 0.8em 0 0.2em 0;
}
h2.solo {
margin-bottom: 1em;
}
h3 {
/* Sub-headers (also used as post headers, but defined later) */
font-family: Arial, Helvetica, sans-serif;
font-weight: bold;
text-transform: uppercase;
border-bottom: 1px solid #CCCCCC;
margin-bottom: 3px;
padding-bottom: 2px;
font-size: 1.05em;
color: #989898;
margin-top: 20px;
}
h4 {
/* Forum and topic list titles */
font-family: "Trebuchet MS", Verdana, Helvetica, Arial, Sans-serif;
font-size: 1.3em;
}
p {
line-height: 1.3em;
font-size: 1.1em;
margin-bottom: 1.5em;
}
img {
border-width: 0;
}
hr {
/* Also see tweaks.css */
border: 0 none #FFFFFF;
border-top: 1px solid #CCCCCC;
height: 1px;
margin: 5px 0;
display: block;
clear: both;
}
hr.dashed {
border-top: 1px dashed #CCCCCC;
margin: 10px 0;
}
hr.divider {
display: none;
}
p.right {
text-align: right;
}
/* Main blocks
---------------------------------------- */
#wrap {
padding: 5px 5px;
min-width: 900px;
margin: 0 auto;
background-color: #ffffff;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
}
#simple-wrap {
padding: 6px 10px;
background-color: #ffffff;
}
#page-body {
margin: 4px 0;
clear: both;
}
#page-footer {
clear: both;
}
#page-footer h3 {
margin-top: 20px;
}
#logo {
float: left;
width: auto;
padding: 10px 13px 0 10px;
}
a#logo:hover {
text-decoration: none;
}
/* Search box
--------------------------------------------- */
#search-box {
color: #FFFFFF;
position: relative;
margin-top: 30px;
margin-right: 5px;
display: block;
float: right;
text-align: right;
white-space: nowrap; /* For Opera */
}
#search-box #keywords {
width: 95px;
background-color: #FFF;
}
#search-box input {
border: 1px solid #b0b0b0;
}
/* .button1 style defined later, just a few tweaks for the search button version */
#search-box input.button1 {
padding: 1px 5px;
}
#search-box li {
text-align: right;
margin-top: 4px;
}
#search-box img {
vertical-align: middle;
margin-right: 3px;
}
/* Site description and logo */
#site-description {
float: left;
width: 70%;
}
#site-description h1 {
margin-right: 0;
}
/* Round cornered boxes and backgrounds
---------------------------------------- */
.headerbar {
background: #ebebeb none repeat-x 0 0;
color: #FFFFFF;
margin-bottom: 4px;
padding: 0 5px;
}
.navbar {
background-color: #ebebeb;
padding: 0 10px;
}
.forabg {
background: #b1b1b1 none repeat-x 0 0;
margin-bottom: 4px;
padding: 0 5px;
clear: both;
}
.forumbg {
background: #ebebeb none repeat-x 0 0;
margin-bottom: 4px;
padding: 0 5px;
clear: both;
}
.panel {
margin-bottom: 4px;
padding: 0 10px;
background-color: #f3f3f3;
color: #3f3f3f;
}
.post {
padding: 0 10px;
margin-bottom: 4px;
background-repeat: no-repeat;
background-position: 100% 0;
}
.post:target .content {
color: #000000;
}
.post:target h3 a {
color: #000000;
}
.bg1 { background-color: #f7f7f7;}
.bg2 { background-color: #f2f2f2; }
.bg3 { background-color: #ebebeb; }
.rowbg {
margin: 5px 5px 2px 5px;
}
.ucprowbg {
background-color: #e2e2e2;
}
.fieldsbg {
/*border: 1px #DBDEE2 solid;*/
background-color: #eaeaea;
}
span.corners-top, span.corners-bottom, span.corners-top span, span.corners-bottom span {
font-size: 1px;
line-height: 1px;
display: block;
height: 5px;
background-repeat: no-repeat;
}
span.corners-top {
background-image: none;
background-position: 0 0;
margin: 0 -5px;
}
span.corners-top span {
background-image: none;
background-position: 100% 0;
}
span.corners-bottom {
background-image: none;
background-position: 0 100%;
margin: 0 -5px;
clear: both;
}
span.corners-bottom span {
background-image: none;
background-position: 100% 100%;
}
.headbg span.corners-bottom {
margin-bottom: -1px;
}
.post span.corners-top, .post span.corners-bottom, .panel span.corners-top, .panel span.corners-bottom, .navbar span.corners-top, .navbar span.corners-bottom {
margin: 0 -10px;
}
.rules span.corners-top {
margin: 0 -10px 5px -10px;
}
.rules span.corners-bottom {
margin: 5px -10px 0 -10px;
}
/* Horizontal lists
----------------------------------------*/
ul.linklist {
display: block;
margin: 0;
}
ul.linklist li {
display: block;
list-style-type: none;
float: left;
width: auto;
margin-right: 5px;
font-size: 1.1em;
line-height: 2.2em;
}
ul.linklist li.rightside, p.rightside {
float: right;
margin-right: 0;
margin-left: 5px;
text-align: right;
}
ul.navlinks {
padding-bottom: 1px;
margin-bottom: 1px;
border-bottom: 1px solid #FFFFFF;
font-weight: bold;
}
ul.leftside {
float: left;
margin-left: 0;
margin-right: 5px;
text-align: left;
}
ul.rightside {
float: right;
margin-left: 5px;
margin-right: -5px;
text-align: right;
}
/* Table styles
----------------------------------------*/
table.table1 {
/* See tweaks.css */
}
#ucp-main table.table1 {
padding: 2px;
}
table.table1 thead th {
font-weight: normal;
text-transform: uppercase;
color: #FFFFFF;
line-height: 1.3em;
font-size: 1em;
padding: 7px 8px;
}
table.table1 thead th span {
padding-left: 7px;
}
table.table1 tbody tr {
border: 1px solid #cfcfcf;
}
table.table1 tbody tr:hover, table.table1 tbody tr.hover {
background-color: #f6f6f6;
color: #000;
}
table.table1 td {
color: #6a6a6a;
font-size: 1.1em;
}
table.table1 tbody td {
padding: 5px;
border-top: 1px solid #FAFAFA;
}
table.table1 tbody th {
padding: 5px;
border-bottom: 1px solid #000000;
text-align: left;
color: #333333;
background-color: #FFFFFF;
}
/* Specific column styles */
table.table1 .name { text-align: left; }
table.table1 .posts { text-align: center !important; width: 7%; }
table.table1 .joined { text-align: left; width: 15%; }
table.table1 .active { text-align: left; width: 15%; }
table.table1 .mark { text-align: center; width: 7%; }
table.table1 .info { text-align: left; width: 30%; }
table.table1 .info div { width: 100%; white-space: normal; overflow: hidden; }
table.table1 .autocol { line-height: 2em; white-space: nowrap; }
table.table1 thead .autocol { padding-left: 1em; }
table.table1 span.rank-img {
float: right;
width: auto;
}
table.info td {
padding: 3px;
}
table.info tbody th {
padding: 3px;
text-align: right;
vertical-align: top;
color: #000000;
font-weight: normal;
}
.forumbg table.table1 {
margin: 0;
}
.forumbg-table > .inner {
margin: 0 -1px;
}
.forumbg-table > .inner > span.corners-top {
margin: 0 -4px -1px -4px;
}
.forumbg-table > .inner > span.corners-bottom {
margin: -1px -4px 0 -4px;
}
/* Misc layout styles
---------------------------------------- */
/* column[1-2] styles are containers for two column layouts
Also see tweaks.css */
.column1 {
float: left;
clear: left;
width: 49%;
}
.column2 {
float: right;
clear: right;
width: 49%;
}
/* General classes for placing floating blocks */
.left-box {
float: left;
width: auto;
text-align: left;
}
.right-box {
float: right;
width: auto;
text-align: right;
}
dl.details {
/*font-family: "Lucida Grande", Verdana, Helvetica, Arial, sans-serif;*/
font-size: 1.1em;
}
dl.details dt {
float: left;
clear: left;
width: 30%;
text-align: right;
color: #000000;
display: block;
}
dl.details dd {
margin-left: 0;
padding-left: 5px;
margin-bottom: 5px;
color: #828282;
float: left;
width: 65%;
}
/* Pagination
---------------------------------------- */
.pagination {
height: 1%; /* IE tweak (holly hack) */
width: auto;
text-align: right;
margin-top: 5px;
float: right;
}
.pagination span.page-sep {
display: none;
}
li.pagination {
margin-top: 0;
}
.pagination strong, .pagination b {
font-weight: normal;
}
.pagination span strong {
padding: 0 2px;
margin: 0 2px;
font-weight: normal;
color: #FFFFFF;
background-color: #bfbfbf;
border: 1px solid #bfbfbf;
font-size: 0.9em;
}
.pagination span a, .pagination span a:link, .pagination span a:visited, .pagination span a:active {
font-weight: normal;
text-decoration: none;
color: #747474;
margin: 0 2px;
padding: 0 2px;
background-color: #eeeeee;
border: 1px solid #bababa;
font-size: 0.9em;
line-height: 1.5em;
}
.pagination span a:hover {
border-color: #d2d2d2;
background-color: #d2d2d2;
color: #FFF;
text-decoration: none;
}
.pagination img {
vertical-align: middle;
}
/* Pagination in viewforum for multipage topics */
.row .pagination {
display: block;
float: right;
width: auto;
margin-top: 0;
padding: 1px 0 1px 15px;
font-size: 0.9em;
background: none 0 50% no-repeat;
}
.row .pagination span a, li.pagination span a {
background-color: #FFFFFF;
}
.row .pagination span a:hover, li.pagination span a:hover {
background-color: #d2d2d2;
}
/* Miscellaneous styles
---------------------------------------- */
#forum-permissions {
float: right;
width: auto;
padding-left: 5px;
margin-left: 5px;
margin-top: 10px;
text-align: right;
}
.copyright {
padding: 5px;
text-align: center;
color: #555555;
}
.small {
font-size: 0.9em !important;
}
.titlespace {
margin-bottom: 15px;
}
.headerspace {
margin-top: 20px;
}
.error {
color: #bcbcbc;
font-weight: bold;
font-size: 1em;
}
.reported {
background-color: #f7f7f7;
}
li.reported:hover {
background-color: #ececec;
}
div.rules {
background-color: #ececec;
color: #bcbcbc;
padding: 0 10px;
margin: 10px 0;
font-size: 1.1em;
}
div.rules ul, div.rules ol {
margin-left: 20px;
}
p.rules {
background-color: #ececec;
background-image: none;
padding: 5px;
}
p.rules img {
vertical-align: middle;
padding-top: 5px;
}
p.rules a {
vertical-align: middle;
clear: both;
}
#top {
position: absolute;
top: -20px;
}
.clear {
display: block;
clear: both;
font-size: 1px;
line-height: 1px;
background: transparent;
}
overall_header
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!-- INCLUDE dualcore_config.html -->
<html xmlns="http://www.w3.org/1999/xhtml" dir="{S_CONTENT_DIRECTION}" lang="{S_USER_LANG}" xml:lang="{S_USER_LANG}">
<head>
<meta http-equiv="content-type" content="text/html; charset={S_CONTENT_ENCODING}" />
<meta http-equiv="content-style-type" content="text/css" />
<meta http-equiv="content-language" content="{S_USER_LANG}" />
<meta http-equiv="imagetoolbar" content="no" />
<meta name="resource-type" content="document" />
<meta name="distribution" content="global" />
<meta name="keywords" content="" />
<meta name="description" content="" />
{META}
<title>{SITENAME} • <!-- IF S_IN_MCP -->{L_MCP} • <!-- ELSEIF S_IN_UCP -->{L_UCP} • <!-- ENDIF -->{PAGE_TITLE}</title>
<!-- IF S_ENABLE_FEEDS -->
<!-- IF S_ENABLE_FEEDS_OVERALL --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {SITENAME}" href="{U_FEED}" /><!-- ENDIF -->
<!-- IF S_ENABLE_FEEDS_NEWS --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FEED_NEWS}" href="{U_FEED}?mode=news" /><!-- ENDIF -->
<!-- IF S_ENABLE_FEEDS_FORUMS --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_ALL_FORUMS}" href="{U_FEED}?mode=forums" /><!-- ENDIF -->
<!-- IF S_ENABLE_FEEDS_TOPICS --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FEED_TOPICS_NEW}" href="{U_FEED}?mode=topics" /><!-- ENDIF -->
<!-- IF S_ENABLE_FEEDS_TOPICS_ACTIVE --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FEED_TOPICS_ACTIVE}" href="{U_FEED}?mode=topics_active" /><!-- ENDIF -->
<!-- IF S_ENABLE_FEEDS_FORUM and S_FORUM_ID --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FORUM} - {FORUM_NAME}" href="{U_FEED}?f={S_FORUM_ID}" /><!-- ENDIF -->
<!-- IF S_ENABLE_FEEDS_TOPIC and S_TOPIC_ID --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_TOPIC} - {TOPIC_TITLE}" href="{U_FEED}?f={S_FORUM_ID}&t={S_TOPIC_ID}" /><!-- ENDIF -->
<!-- ENDIF -->
<!--
phpBB style name: DualCore
Based on style: prosilver (this is the default phpBB3 style)
Original author: Tom Beddard ( http://www.subBlue.com/ )
Modified by: Abhishek Srivastava ( http://www.abhisheksrivastava.in )
-->
<script type="text/javascript">
// <![CDATA[
var jump_page = '{LA_JUMP_PAGE}:';
var on_page = '{ON_PAGE}';
var per_page = '{PER_PAGE}';
var base_url = '{A_BASE_URL}';
var style_cookie = 'phpBBstyle';
var style_cookie_settings = '{A_COOKIE_SETTINGS}';
var onload_functions = new Array();
var onunload_functions = new Array();
<!-- IF S_USER_PM_POPUP and S_NEW_PM -->
var url = '{UA_POPUP_PM}';
window.open(url.replace(/&/g, '&'), '_phpbbprivmsg', 'height=225,resizable=yes,scrollbars=yes, width=400');
<!-- ENDIF -->
/**
* Find a member
*/
function find_username(url)
{
popup(url, 760, 570, '_usersearch');
return false;
}
/**
* New function for handling multiple calls to window.onload and window.unload by pentapenguin
*/
window.onload = function()
{
for (var i = 0; i < onload_functions.length; i++)
{
eval(onload_functions[i]);
}
};
window.onunload = function()
{
for (var i = 0; i < onunload_functions.length; i++)
{
eval(onunload_functions[i]);
}
};
// ]]>
</script>
<script type="text/javascript" src="{T_SUPER_TEMPLATE_PATH}/styleswitcher.js"></script>
<script type="text/javascript" src="{T_SUPER_TEMPLATE_PATH}/forum_fn.js"></script>
<script type="text/javascript" src="{T_TEMPLATE_PATH}/jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="{T_TEMPLATE_PATH}/jquery.cookie.js"></script>
<script type="text/javascript" src="{T_TEMPLATE_PATH}/jquery.collapse.js"></script>
<link href="{T_THEME_PATH}/print.css" rel="stylesheet" type="text/css" media="print" title="printonly" />
<link href="{T_STYLESHEET_LINK}" rel="stylesheet" type="text/css" media="screen, projection" />
<link href="{T_THEME_PATH}/normal.css" rel="stylesheet" type="text/css" title="A" />
<link href="{T_THEME_PATH}/medium.css" rel="alternate stylesheet" type="text/css" title="A+" />
<link href="{T_THEME_PATH}/large.css" rel="alternate stylesheet" type="text/css" title="A++" />
<!-- IF S_CONTENT_DIRECTION eq 'rtl' -->
<link href="{T_THEME_PATH}/bidi.css" rel="stylesheet" type="text/css" media="screen, projection" />
<!-- ENDIF -->
</head>
<body id="phpbb" class="section-{SCRIPT_NAME} {S_CONTENT_DIRECTION}">
<div class="topnav">
<div style="margin: 0 auto; min-width: 900px; width: {$BOARD_WIDTH}; position: relative;">
<div class="navlink"><ul>
<!-- IF not S_USER_LOGGED_IN and S_REGISTER_ENABLED and not (S_SHOW_COPPA or S_REGISTRATION) and not S_IS_BOT -->
<li><a href="{U_LOGIN_LOGOUT}" title="{L_LOGIN_LOGOUT}" accesskey="x">
<strong><img src="{T_THEME_PATH}/images/icon_logout.png" width="16" height="16" alt="" />{L_LOGIN_LOGOUT}</strong>
</a></li>
<li><a href="{U_REGISTER}">
<strong><img src="{T_THEME_PATH}/images/icon_register.png" width="16" height="16" alt="" />{L_REGISTER}</strong>
</a></li>
<!-- ENDIF -->
<!-- IF S_USER_LOGGED_IN and not S_IS_BOT -->
<li><a href="{U_PROFILE}">
<strong><img src="{T_THEME_PATH}/images/icon_ucp.png" width="20" height="20" alt="" />{S_USERNAME}</strong>
</a></li>
<!-- ENDIF -->
<!-- IF U_ACP -->
<li><a href="{U_ACP}">
<strong><img src="{T_THEME_PATH}/images/icon_admin.png" width="20" height="20" alt="" />{L_ACP}</strong>
</a></li>
<!-- ENDIF -->
<!-- IF S_DISPLAY_PM and not S_IS_BOT and S_USER_LOGGED_IN -->
<li><a href="{U_PRIVATEMSGS}">
<strong><img src="{T_THEME_PATH}/images/icon_pm.png" width="20" height="20" alt="" />{PRIVATE_MESSAGE_INFO}</strong>
</a></li>
<!-- ENDIF -->
<!-- IF U_RESTORE_PERMISSIONS -->
<li><a href="{U_RESTORE_PERMISSIONS}">
<strong><img src="{T_THEME_PATH}/images/icon_restore.png" width="16" height="16" alt="" />{L_RESTORE_PERMISSIONS}</strong>
</a></li>
<!-- ENDIF -->
<!-- IF S_USER_LOGGED_IN and not S_IS_BOT -->
<li><a href="{U_LOGIN_LOGOUT}" title="{L_LOGIN_LOGOUT}" accesskey="x">
<strong><img src="{T_THEME_PATH}/images/icon_logout.png" width="20" height="20" alt="" />{L_LOGOUT}</strong>
</a></li>
<!-- ENDIF -->
</ul></div>
<div class="navlink" style="float: right;"><ul><li>
<!-- IF S_USER_LOGGED_IN -->
<div class="float-right">
<div class="quicksearch">
<!-- IF S_DISPLAY_SEARCH and not S_IN_SEARCH -->
<form action="{U_SEARCH}" method="get" id="search">
<fieldset>
<input name="keywords" id="keywords" type="text" maxlength="128" value="<!-- IF SEARCH_WORDS-->{SEARCH_WORDS}<!-- ELSE -->{L_SEARCH_MINI}<!-- ENDIF -->" onclick="if(this.value=='{LA_SEARCH_MINI}')this.value='';" onblur="if(this.value=='')this.value='{LA_SEARCH_MINI}';" />
<!--<input class="button2" value="{L_SEARCH}" type="submit" />-->
{S_SEARCH_HIDDEN_FIELDS}
</fieldset>
</form>
<!-- ENDIF -->
</div>
</div>
<!-- ENDIF -->
<!-- IF not S_USER_LOGGED_IN and not S_IS_BOT -->
<form method="post" action="{S_LOGIN_ACTION}" style="margin-top: -6px; margin-right: -5px;">
<fieldset class="quick-login">
<label for="username" style="color: #fff;">{L_USERNAME}:</label> <input type="text" name="username" id="username" size="15" class="inputbox" title="{L_USERNAME}" />
<label for="password" style="color: #fff;">{L_PASSWORD}:</label> <input type="password" name="password" id="password" size="15" class="inputbox" title="{L_PASSWORD}" />
<input type="submit" name="login" value="{L_LOGIN}" class="button1" />
{S_LOGIN_REDIRECT}
</fieldset>
</form>
<!-- ENDIF -->
</li></ul></div>
</div>
</div>
<div id="wrap" style="width: {$BOARD_WIDTH};">
<a id="top" name="top" accesskey="t"></a>
<div id="page-header">
<div class="mainheader">
<a style="display: inline-block; width: 900px; height: 145px;" href="{U_INDEX}" accesskey="h" class="logo.png"<!-- IF $LOGO_ANIMATION == 'on' --> dualcore-logo-animation<!-- ENDIF -->"></a>
</div>
<div class="mainheader">
<div class="mainnav<!-- IF $MENU_ANIMATION == 'on' --> mainnav-animation<!-- ENDIF -->"><ul>
<li><a href="{U_INDEX}" accesskey="h">
<strong>{L_HOME}</strong>
<span>{SITENAME}</span>
</a></li>
<li><a href="{U_FAQ}" title="{L_FAQ_EXPLAIN}">
<strong>{L_FAQ}</strong>
<span>{L_FAQ_EXPLAIN}</span>
</a></li>
<!-- IF not S_IS_BOT and S_DISPLAY_MEMBERLIST -->
<li><a href="{U_MEMBERLIST}" title="{L_MEMBERLIST_EXPLAIN}">
<strong>{L_MEMBERLIST}</strong>
<span>{L_MEMBERLIST_EXPLAIN}</span>
</a></li>
<!-- ENDIF -->
<!-- IF S_DISPLAY_SEARCH -->
<li><a href="{U_SEARCH}" title="{L_SEARCH_ADV_EXPLAIN}">
<strong>{L_SEARCH}</strong>
<span>{L_SEARCH_ADV_EXPLAIN}</span>
</a></li>
<!-- ENDIF -->
<!-- IF not S_IS_BOT and S_USER_LOGGED_IN -->
<li><a href="{U_PROFILE}" title="{L_PROFILE}" accesskey="e">
<strong>{L_READ_PROFILE}</strong>
<span>{L_PROFILE}</span>
</a></li>
<!-- ENDIF -->
</ul></div>
</div>
<div class="nav-bar">
<img src="{T_THEME_PATH}/images/icon_home.png" width="16" height="16" alt="" />{L_INDEX} <!-- BEGIN navlinks --> <strong>‹</strong> {navlinks.FORUM_NAME}<!-- END navlinks -->
</div>
</div>
<a name="start_here"></a>
<div id="page-body">
<!-- IF S_BOARD_DISABLED and S_USER_LOGGED_IN and (U_MCP or U_ACP) -->
<div id="information" class="rules">
<div class="inner"><span class="corners-top"><span></span></span>
<strong>{L_INFORMATION}:</strong> {L_BOARD_DISABLED}
<span class="corners-bottom"><span></span></span></div>
</div>
<!-- ENDIF -->

Answer 1

In the html you've included, try replacing
<div class="mainheader">
<a style="display: inline-block; width: 900px; height: 145px;" href="{U_INDEX}" accesskey="h" class="logo.png"<!-- IF $LOGO_ANIMATION == 'on' --> dualcore-logo-animation<!-- ENDIF -->"></a>
</div>
with
<div class="mainheader">
<a style="display: inline-block; width: 100%;" href="{U_INDEX}" accesskey="h"><img src="images/dep_banner.png" style="width=100%"/></a>
</div>
Adding the image as <img> instead of background-image will be easier to resize. More info here.